Razor blade sharpener



APII 24; 1945 w. T. CLARKE A 2,374,419

RAZOR BLADE SHAREENERV Filed Jan. 24, 1944 2 Sheets-Sheet 2 Patented Apr. 24,` 1945 2,31441stSv 2,374,419. 1 n. "RAZORBILADE SHRPEE j william Themas Clarke; maintswenn` ontariacanaaw n Applietimuanuaryzfi, 1944i Aserialfini$519525 j z iolaimsf (Gummi-58;

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the ,are deningrpivot points oftheroscillating frame.,V l

` One: of the V.principe-k objects l of this: invention isi fto. providey mea-ns for adjustingethe tension between the blade Land .the :sharpening element Whilst maintainingA a-uniferm are` concentric with the A semi-cylindricah surface :of the sharpening element.

Another, object `ofA the inventionis to Aprovide arblade sharpenenof `the` typeydescribed which will facilitate l thel =operations of placingithe blade inthesharpener and the-removal lofi the blade therfr'ome` Still. anothen object is-totfacilitate the sharpeningr operation.-itself,"` theinvention `propesesea ro= tatable, fingertip control on the actuatingv'arrn which-isslidable `against/the 'baseandistherefore automatically *n pat-hdeiiningt requiring antabson lutelminimumloffmanual:dexteritwl l 4Stilliether objects-of` a more general nature are; tol-provide an eicient, durablefandninexpensive device-@inthe characteresetforthfor'thefpurpos of improv-ing` ,etheffshavingf-quality and prolong' ing ifthelnseful: lifei of :all exiblef thintype Esafety razor bladeszf` l n l With theY above fnoted'aici btherobjects-ii1^`view which'may appearaas thefde'scriptionpoceedsithe mventionferesides?intnefnove:constfuetgcom: bin'ationiand arrangement of cooperating parts asvhereinafter more specifically "st frth-,fclainfd Figi-3 islaperspective'view-ofI tiietbiseo"sharpening element. f

Fg'slf-i fand M5 14illustrate; the `blade holder tension adjustment members.

Fig. 6 is a perspective View of one side member of the main frame.

` connection of the actuating, arm.

bytnegai fra-iniL Thats ma hsa camini-wsdl pq mi" transveis'eseenenw engage tiiterisi ajiisti menaient; Thennwaruiyextenirefldgs 2 n orinesH-nirw trimmen-emitir snrfee y dowel-like ends of the screws 26.

'I'he blade retainer consists of an inverted T 21, preferably made of rubber although other resilient material may be used, a channel shaped ated.

socket 28, to which the T piece 21, is secured and a frame 29, as seen particularly in Figure 2. The aforementioned screws 26, secure the socket and frame together. The transverse center portion of this frame has an orifice 30, therethrough through which the restricted end of the tensional adjustment bolt extends.

The blade retainer is adjustably mounted on the oscillating frame by means of this tensional adjustment bolt 3|, which passes down through the slot 20, in the capspiece, is threadably engaged in the oscillating frame 22, and whose restricted extremity passes through the orifice 30, until theshoulder thereof abuts the frame 29. A thumbscrew 32, is threadably attached to the restricted extremity to secure the frame 29, to the member 3l. The dowel-like extremities of the screws 26, which are slidable through the flanges 25 prevent lateral movement of the blade retainer whilst permitting vertical movement thereof. It will be noted (Figure `2) that the frame 29, has an integrallyA formed arm` 33,n extending beyond the sidewall of the sharpening element I0, and to which, at the extremity is hinged at 34 an actuating arm 35, terminally provided with a rotatable, recessed button 36, for fingertip control of the oscillating mechanism. The rivet 3l, is arranged to slide against the sidewall of the sharpening element when the actuating arm is oper- To restrict the movement of the oscillating frame I Vhave provided two arc definers 38, mounted transversely on the main frame and secured thereto by the set screws I6, the rounded edge 39, thereofabutting the oscillating frame when itrhas reached the predetermined upper limits of its arc.

The mechanical functioning of the related parts is as follows: by raising the main frame, that is pivoting it upward around 'the studs I3, the assembly. is removed from the concavity so that the razor blade maybe inserted therein. The assembly is then closed'so that the blade retainer is evenly placed over the razor blade. The sharpening tension is determined by the'space existent between the concavity and the member 21, and is adjustable by' rotating the anti-clockwise threaded adjustment bolt 3 I, to the required position and then tightening vthe thumb nut 32, to the end that the blade retainer isr secured to the oscillatng frame in the position relative to the surface of the concavity, determined by the user. The actuating farm is then oscillated as hereinbefore described thus oscillating the frame 22, and

.the blade retainer carried thereby and causing the razor blade to slide against the wall of the sharpening element. The sharpening of one side accomplished the blade is reversed and the procedure repeated, h

It is believed that the structure and advantages of the device may be apparent from the foregoing paragraphs taken in conjunction with the accompanying drawings without further detailed description. v

While the preferred embodiment of the invention has" been vdisclosed it is understood that minor changes in the detail of construction and arrangementofthe co-operating parts may be resorted totwithin the scope of thatv which is claimed. without departing from the spirit of the invention.

Iclaim:

l. A'razor blade Sharpener comprising a sharpening element of vitreous material having a semicylindrical sharpening surface formed in the top, a frame pivotally attached to said sharpening element in covering relation to the sharpening surface, an oscillating frame carried by said first named frame, a blade retainer carried by said oscillating frame, said retainer being adjustable towards and from the sharpening surface, a resilient member carried by the retainer adapted to yieldably press the blade held thereby against the sharpening surface and means for adjusting the tension of said resilient member against the blade.

2. `A razor blade Sharpener comprising a sharpening element of vitreous material having a semicylindrical sharpening surface formed in the top, a frame vpivotally attached to said sharpening element in covering relation to the sharpening surface, an oscillatingframe carried bysaidrst namedframe, a blade retainer carried by said oscillating frame, said retainer being adjustable towards and from the sharpening surface, a resilient member carried by the retainer adapted to yieldably press the blade held thereby against the sharpening surface, and an adjusting screw connected to said retainer and having threaded engagement with said oscillating frame, said screw extending through a slot in the first named frame for adjusting the tension of the resilient member against the blade.

3. A razor blade Sharpener comprising a sharpening element of vitreous material having a semicylindrical sharpening surface formed in the top, a frame pivotally attached to said sharpening element in covering relation to the sharpening surface, an oscillating frame carried by said first named frame, a blade retainer carried by said oscillating frame, said retainer being adjustable towards and from the sharpening surface, a resilient member carried by the retainer adapted to yieldably press the blade held thereby against the sharpening surface, means for adjusting the tension of said resilient member against the blade, and adjustable means carried by said first named frame for limiting the movement of said oscillating frame. y

4. A razor blade sharpening device comprising a block of vitreous material having a semi-cylindrical recess in its top face forming a sharpening surface, a pair of side members pivotally connected at one end to the sides of said block having bearings* intermediate their ends concentric to the arc of the recess, a top plate `connecting said side members having a central longitudinal slot, an oscillating frame having trunnions journaled in the bearings of the side members, a blade retainer member mounted on said oscillating frame for movement towards and from the sharpening surface, an adjusting screw connected to said retainer member andY threadedly mounted in said oscillating frame having its. upper end extending'through the slot in the top plate, and a resilient block of material carried by said retainer member adapted to yieldably press a razor blade placed between the block and sharpening surface into co-acting relationship with the sharpening surface during movement of the oscillating frame. A I 4.

WILLIAM THOMAS CLARKE. 

